--
-- Test foreign-data wrapper and server management.
--
-- Clean up in case a prior regression run failed
-- Suppress NOTICE messages when roles don't exist
SET client_min_messages TO 'warning';

DROP ROLE IF EXISTS regress_foreign_data_user, regress_test_role, regress_test_role2, regress_test_role_super, regress_test_indirect, regress_unprivileged_role;

RESET client_min_messages;

CREATE ROLE regress_foreign_data_user LOGIN SUPERUSER;

SET SESSION AUTHORIZATION 'regress_foreign_data_user';

CREATE ROLE regress_test_role;

CREATE ROLE regress_test_role2;

CREATE ROLE regress_test_role_super SUPERUSER;

CREATE ROLE regress_test_indirect;

CREATE ROLE regress_unprivileged_role;

CREATE FOREIGN DATA WRAPPER dummy;

COMMENT ON FOREIGN DATA WRAPPER dummy IS 'useless';

CREATE FOREIGN DATA WRAPPER postgresql VALIDATOR postgresql_fdw_validator;

-- At this point we should have 2 built-in wrappers and no servers.
SELECT
    fdwname,
    fdwhandler::regproc,
    fdwvalidator::regproc,
    fdwoptions
FROM
    pg_foreign_data_wrapper
ORDER BY
    1,
    2,
    3;

SELECT
    srvname,
    srvoptions
FROM
    pg_foreign_server;

SELECT
    *
FROM
    pg_user_mapping;

-- CREATE FOREIGN DATA WRAPPER
CREATE FOREIGN DATA WRAPPER foo VALIDATOR bar;

-- ERROR
CREATE FOREIGN DATA WRAPPER foo;

\dew
CREATE FOREIGN DATA WRAPPER foo;

-- duplicate
DROP FOREIGN DATA WRAPPER foo;

CREATE FOREIGN DATA WRAPPER foo OPTIONS (
    testing '1'
);

\dew+
DROP FOREIGN DATA WRAPPER foo;

CREATE FOREIGN DATA WRAPPER foo OPTIONS (
    testing '1',
    testing '2'
);

-- ERROR
CREATE FOREIGN DATA WRAPPER foo OPTIONS (
    testing '1',
    another '2'
);

\dew+
DROP FOREIGN DATA WRAPPER foo;

SET ROLE regress_test_role;

CREATE FOREIGN DATA WRAPPER foo;

-- ERROR
RESET ROLE;

CREATE FOREIGN DATA WRAPPER foo VALIDATOR postgresql_fdw_validator;

\dew+
-- HANDLER related checks
CREATE FUNCTION invalid_fdw_handler ()
    RETURNS int
    LANGUAGE SQL
    AS '
    SELECT
        1;
';

CREATE FOREIGN DATA WRAPPER test_fdw HANDLER invalid_fdw_handler;

-- ERROR
CREATE FOREIGN DATA WRAPPER test_fdw HANDLER test_fdw_handler HANDLER invalid_fdw_handler;

-- ERROR
CREATE FOREIGN DATA WRAPPER test_fdw HANDLER test_fdw_handler;

DROP FOREIGN DATA WRAPPER test_fdw;

-- ALTER FOREIGN DATA WRAPPER
ALTER FOREIGN DATA WRAPPER foo;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo VALIDATOR bar;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo NO VALIDATOR;

\dew+
ALTER FOREIGN DATA WRAPPER foo OPTIONS (a '1', b '2');

ALTER FOREIGN DATA WRAPPER foo OPTIONS ( SET c '4');

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OPTIONS (DROP c);

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OPTIONS (ADD x '1',
DROP x);

\dew+
ALTER FOREIGN DATA WRAPPER foo OPTIONS (DROP a, SET b '3',
ADD c '4');

\dew+
ALTER FOREIGN DATA WRAPPER foo OPTIONS (a '2');

ALTER FOREIGN DATA WRAPPER foo OPTIONS (b '4');

-- ERROR
\dew+
SET ROLE regress_test_role;

ALTER FOREIGN DATA WRAPPER foo OPTIONS (ADD d '5');

-- ERROR
SET ROLE regress_test_role_super;

ALTER FOREIGN DATA WRAPPER foo OPTIONS (ADD d '5');

\dew+
ALTER FOREIGN DATA WRAPPER foo OWNER TO regress_test_role;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OWNER TO regress_test_role_super;

ALTER ROLE regress_test_role_super NOSUPERUSER;

SET ROLE regress_test_role_super;

ALTER FOREIGN DATA WRAPPER foo OPTIONS (ADD e '6');

-- ERROR
RESET ROLE;

\dew+
ALTER FOREIGN DATA WRAPPER foo RENAME TO foo1;

\dew+
ALTER FOREIGN DATA WRAPPER foo1 RENAME TO foo;

-- HANDLER related checks
ALTER FOREIGN DATA WRAPPER foo HANDLER invalid_fdw_handler;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo HANDLER test_fdw_handler HANDLER anything;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo HANDLER test_fdw_handler;

DROP FUNCTION invalid_fdw_handler ();

-- DROP FOREIGN DATA WRAPPER
DROP FOREIGN DATA WRAPPER nonexistent;

-- ERROR
DROP FOREIGN DATA WRAPPER IF EXISTS nonexistent;

\dew+
DROP ROLE regress_test_role_super;

-- ERROR
SET ROLE regress_test_role_super;

DROP FOREIGN DATA WRAPPER foo;

RESET ROLE;

DROP ROLE regress_test_role_super;

\dew+
CREATE FOREIGN DATA WRAPPER foo;

CREATE SERVER s1 FOREIGN DATA WRAPPER foo;

COMMENT ON SERVER s1 IS 'foreign server';

CREATE USER MAPPING FOR CURRENT_USER SERVER s1;

CREATE USER MAPPING FOR CURRENT_USER SERVER s1;

-- ERROR
CREATE USER MAPPING IF NOT EXISTS FOR CURRENT_USER SERVER s1;

-- NOTICE
\dew+
\des+
\deu+
DROP FOREIGN DATA WRAPPER foo;

-- ERROR
SET ROLE regress_test_role;

DROP FOREIGN DATA WRAPPER foo CASCADE;

-- ERROR
RESET ROLE;

DROP FOREIGN DATA WRAPPER foo CASCADE;

\dew+
\des+
\deu+
-- exercise CREATE SERVER
CREATE SERVER s1 FOREIGN DATA WRAPPER foo;

-- ERROR
CREATE FOREIGN DATA WRAPPER foo OPTIONS (
    "test wrapper" 'true'
);

CREATE SERVER s1 FOREIGN DATA WRAPPER foo;

CREATE SERVER s1 FOREIGN DATA WRAPPER foo;

-- ERROR
CREATE SERVER IF NOT EXISTS s1 FOREIGN DATA WRAPPER foo;

-- No ERROR, just NOTICE
CREATE SERVER s2 FOREIGN DATA WRAPPER foo OPTIONS (
    host 'a',
    dbname 'b'
);

CREATE SERVER s3 TYPE 'oracle' FOREIGN DATA WRAPPER foo;

CREATE SERVER s4 TYPE 'oracle' FOREIGN DATA WRAPPER foo OPTIONS (
    host 'a',
    dbname 'b'
);

CREATE SERVER s5 VERSION '15.0' FOREIGN DATA WRAPPER foo;

CREATE SERVER s6 VERSION '16.0' FOREIGN DATA WRAPPER foo OPTIONS (
    host 'a',
    dbname 'b'
);

CREATE SERVER s7 TYPE 'oracle' VERSION '17.0' FOREIGN DATA WRAPPER foo OPTIONS (
    host 'a',
    dbname 'b'
);

CREATE SERVER s8 FOREIGN DATA WRAPPER postgresql OPTIONS (
    foo '1'
);

-- ERROR
CREATE SERVER s8 FOREIGN DATA WRAPPER postgresql OPTIONS (
    host 'localhost',
    dbname 's8db'
);

\des+
SET ROLE regress_test_role;

CREATE SERVER t1 FOREIGN DATA WRAPPER foo;

-- ERROR: no usage on FDW
RESET ROLE;

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_role;

SET ROLE regress_test_role;

CREATE SERVER t1 FOREIGN DATA WRAPPER foo;

RESET ROLE;

\des+
REVOKE USAGE ON FOREIGN DATA WRAPPER foo FROM regress_test_role;

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_indirect;

SET ROLE regress_test_role;

CREATE SERVER t2 FOREIGN DATA WRAPPER foo;

-- ERROR
RESET ROLE;

GRANT regress_test_indirect TO regress_test_role;

SET ROLE regress_test_role;

CREATE SERVER t2 FOREIGN DATA WRAPPER foo;

\des+
RESET ROLE;

REVOKE regress_test_indirect FROM regress_test_role;

-- ALTER SERVER
ALTER SERVER s0;

-- ERROR
ALTER SERVER s0 OPTIONS (a '1');

-- ERROR
ALTER SERVER s1 VERSION '1.0' OPTIONS (servername 's1');

ALTER SERVER s2 VERSION '1.1';

ALTER SERVER s3 OPTIONS ("tns name" 'orcl', port '1521');

GRANT USAGE ON FOREIGN SERVER s1 TO regress_test_role;

GRANT USAGE ON FOREIGN SERVER s6 TO regress_test_role2 WITH GRANT OPTION;

\des+
SET ROLE regress_test_role;

ALTER SERVER s1 VERSION '1.1';

-- ERROR
ALTER SERVER s1 OWNER TO regress_test_role;

-- ERROR
RESET ROLE;

ALTER SERVER s1 OWNER TO regress_test_role;

GRANT regress_test_role2 TO regress_test_role;

SET ROLE regress_test_role;

ALTER SERVER s1 VERSION '1.1';

ALTER SERVER s1 OWNER TO regress_test_role2;

-- ERROR
RESET ROLE;

ALTER SERVER s8 OPTIONS (foo '1');

-- ERROR option validation
ALTER SERVER s8 OPTIONS (connect_timeout '30', SET dbname 'db1',
    DROP host);

SET ROLE regress_test_role;

ALTER SERVER s1 OWNER TO regress_test_indirect;

-- ERROR
RESET ROLE;

GRANT regress_test_indirect TO regress_test_role;

SET ROLE regress_test_role;

ALTER SERVER s1 OWNER TO regress_test_indirect;

RESET ROLE;

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_indirect;

SET ROLE regress_test_role;

ALTER SERVER s1 OWNER TO regress_test_indirect;

RESET ROLE;

DROP ROLE regress_test_indirect;

-- ERROR
\des+
ALTER SERVER s8 RENAME TO s8new;

\des+
ALTER SERVER s8new RENAME TO s8;

-- DROP SERVER
DROP SERVER nonexistent;

-- ERROR
DROP SERVER IF EXISTS nonexistent;

\des
SET ROLE regress_test_role;

DROP SERVER s2;

-- ERROR
DROP SERVER s1;

RESET ROLE;

\des
ALTER SERVER s2 OWNER TO regress_test_role;

SET ROLE regress_test_role;

DROP SERVER s2;

RESET ROLE;

\des
CREATE USER MAPPING FOR CURRENT_USER SERVER s3;

\deu
DROP SERVER s3;

-- ERROR
DROP SERVER s3 CASCADE;

\des
\deu
-- CREATE USER MAPPING
CREATE USER MAPPING FOR regress_test_missing_role SERVER s1;

-- ERROR
CREATE USER MAPPING FOR CURRENT_USER SERVER s1;

-- ERROR
CREATE USER MAPPING FOR CURRENT_USER SERVER s4;

CREATE USER MAPPING FOR USER SERVER s4;

-- ERROR duplicate
CREATE USER MAPPING FOR public SERVER s4 OPTIONS (
    "this mapping" 'is public'
);

CREATE USER MAPPING FOR USER SERVER s8 OPTIONS (
    username 'test',
    PASSWORD 'secret'
);

-- ERROR
CREATE USER MAPPING FOR USER SERVER s8 OPTIONS (
    USER 'test',
    PASSWORD 'secret'
);

ALTER SERVER s5 OWNER TO regress_test_role;

ALTER SERVER s6 OWNER TO regress_test_indirect;

SET ROLE regress_test_role;

CREATE USER MAPPING FOR CURRENT_USER SERVER s5;

CREATE USER MAPPING FOR CURRENT_USER SERVER s6 OPTIONS (
    username 'test'
);

CREATE USER MAPPING FOR CURRENT_USER SERVER s7;

-- ERROR
CREATE USER MAPPING FOR public SERVER s8;

-- ERROR
RESET ROLE;

ALTER SERVER t1 OWNER TO regress_test_indirect;

SET ROLE regress_test_role;

CREATE USER MAPPING FOR CURRENT_USER SERVER t1 OPTIONS (
    username 'bob',
    PASSWORD 'boo'
);

CREATE USER MAPPING FOR public SERVER t1;

RESET ROLE;

\deu
-- ALTER USER MAPPING
ALTER USER MAPPING FOR regress_test_missing_role SERVER s4 OPTIONS (gotcha 'true');

-- ERROR
ALTER USER MAPPING FOR USER SERVER ss4 OPTIONS (gotcha 'true');

-- ERROR
ALTER USER MAPPING FOR public SERVER s5 OPTIONS (gotcha 'true');

-- ERROR
ALTER USER MAPPING FOR CURRENT_USER SERVER s8 OPTIONS (username 'test');

-- ERROR
ALTER USER MAPPING FOR CURRENT_USER SERVER s8 OPTIONS (DROP USER, SET PASSWORD 'public');

SET ROLE regress_test_role;

ALTER USER MAPPING FOR CURRENT_USER SERVER s5 OPTIONS (ADD modified '1');

ALTER USER MAPPING FOR public SERVER s4 OPTIONS (ADD modified '1');

-- ERROR
ALTER USER MAPPING FOR public SERVER t1 OPTIONS (ADD modified '1');

RESET ROLE;

\deu+
-- DROP USER MAPPING
DROP USER MAPPING FOR regress_test_missing_role SERVER s4;

-- ERROR
DROP USER MAPPING FOR USER SERVER ss4;

DROP USER MAPPING FOR public SERVER s7;

-- ERROR
DROP USER MAPPING IF EXISTS FOR regress_test_missing_role SERVER s4;

DROP USER MAPPING IF EXISTS FOR USER SERVER ss4;

DROP USER MAPPING IF EXISTS FOR public SERVER s7;

CREATE USER MAPPING FOR public SERVER s8;

SET ROLE regress_test_role;

DROP USER MAPPING FOR public SERVER s8;

-- ERROR
RESET ROLE;

DROP SERVER s7;

\deu
-- CREATE FOREIGN TABLE
CREATE SCHEMA foreign_schema;

CREATE SERVER s0 FOREIGN DATA WRAPPER dummy;

CREATE FOREIGN TABLE ft1 ();

-- ERROR
CREATE FOREIGN TABLE ft1 ()
SERVER no_server;

-- ERROR
CREATE FOREIGN TABLE ft1 (
    c1 integer OPTIONS ("param 1" 'val1') PRIMARY KEY,
    c2 text OPTIONS (param2 'val2', param3 'val3'),
    c3 date)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

-- ERROR
CREATE TABLE ref_table (
    id integer PRIMARY KEY
);

CREATE FOREIGN TABLE ft1 (
    c1 integer OPTIONS ("param 1" 'val1') REFERENCES ref_table (id),
    c2 text OPTIONS (param2 'val2', param3 'val3'),
    c3 date)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

-- ERROR
DROP TABLE ref_table;

CREATE FOREIGN TABLE ft1 (
    c1 integer OPTIONS ("param 1" 'val1') NOT NULL,
    c2 text OPTIONS (param2 'val2', param3 'val3'),
    c3 date,
    UNIQUE (c3))
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

-- ERROR
CREATE FOREIGN TABLE ft1 (
    c1 integer OPTIONS ("param 1" 'val1') NOT NULL,
    c2 text OPTIONS (param2 'val2', param3 'val3') CHECK (c2 <> ''),
    c3 date,
    CHECK (c3 BETWEEN '1994-01-01'::date AND '1994-01-31'::date))
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

COMMENT ON FOREIGN TABLE ft1 IS 'ft1';

COMMENT ON COLUMN ft1.c1 IS 'ft1.c1';

\d+ ft1
\det+
CREATE INDEX id_ft1_c2 ON ft1 (c2);

-- ERROR
SELECT
    *
FROM
    ft1;

-- ERROR
EXPLAIN
SELECT
    *
FROM
    ft1;

-- ERROR
CREATE TABLE lt1 (
    a int
)
PARTITION BY RANGE (a);

CREATE FOREIGN TABLE ft_part1 PARTITION OF lt1
FOR VALUES FROM (0) TO (1000) SERVER s0;

CREATE INDEX ON lt1 (a);

-- ERROR
DROP TABLE lt1;

-- ALTER FOREIGN TABLE
COMMENT ON FOREIGN TABLE ft1 IS 'foreign table';

COMMENT ON FOREIGN TABLE ft1 IS NULL;

COMMENT ON COLUMN ft1.c1 IS 'foreign column';

COMMENT ON COLUMN ft1.c1 IS NULL;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c4 integer;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c5 integer DEFAULT 0;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c6 integer;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c7 integer NOT NULL;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c8 integer;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c9 integer;

ALTER FOREIGN TABLE ft1
    ADD COLUMN c10 integer OPTIONS (p1 'v1');

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c4 SET DEFAULT 0;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c5 DROP DEFAULT;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c6 SET NOT NULL;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c7 DROP NOT NULL;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 TYPE char(10)
    USING '0';

-- ERROR
ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 TYPE char(10);

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 SET DATA TYPE text;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN xmin OPTIONS (ADD p1 'v1');

-- ERROR
ALTER FOREIGN TABLE ft1
    ALTER COLUMN c7 OPTIONS (ADD p1 'v1',
    ADD p2 'v2'),
    ALTER COLUMN c8 OPTIONS (ADD p1 'v1',
    ADD p2 'v2');

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 OPTIONS ( SET p2 'V2',
    DROP p1);

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c1 SET STATISTICS 10000;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c1 SET (n_distinct = 100);

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 SET STATISTICS - 1;

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 SET STORAGE PLAIN;

\d+ ft1
-- can't change the column type if it's used elsewhere
CREATE TABLE use_ft1_column_type (
    x ft1
);

ALTER FOREIGN TABLE ft1
    ALTER COLUMN c8 SET DATA TYPE integer;

-- ERROR
DROP TABLE use_ft1_column_type;

ALTER FOREIGN TABLE ft1
    ADD PRIMARY KEY (c7);

-- ERROR
ALTER FOREIGN TABLE ft1
    ADD CONSTRAINT ft1_c9_check CHECK (c9 < 0) NOT VALID;

ALTER FOREIGN TABLE ft1
    ALTER CONSTRAINT ft1_c9_check DEFERRABLE;

-- ERROR
ALTER FOREIGN TABLE ft1
    DROP CONSTRAINT ft1_c9_check;

ALTER FOREIGN TABLE ft1
    DROP CONSTRAINT no_const;

-- ERROR
ALTER FOREIGN TABLE ft1
    DROP CONSTRAINT IF EXISTS no_const;

ALTER FOREIGN TABLE ft1 OWNER TO regress_test_role;

ALTER FOREIGN TABLE ft1 OPTIONS (DROP DELIMITER, SET quote '~',
ADD escape '@');

ALTER FOREIGN TABLE ft1
    DROP COLUMN no_column;

-- ERROR
ALTER FOREIGN TABLE ft1
    DROP COLUMN IF EXISTS no_column;

ALTER FOREIGN TABLE ft1
    DROP COLUMN c9;

ALTER FOREIGN TABLE ft1 SET SCHEMA foreign_schema;

ALTER FOREIGN TABLE ft1 SET TABLESPACE ts;

-- ERROR
ALTER FOREIGN TABLE foreign_schema.ft1 RENAME c1 TO foreign_column_1;

ALTER FOREIGN TABLE foreign_schema.ft1 RENAME TO foreign_table_1;

\d foreign_schema.foreign_table_1
-- alter noexisting table
ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c4 integer;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c6 integer;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c7 integer NOT NULL;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c8 integer;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c9 integer;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ADD COLUMN c10 integer OPTIONS (p1 'v1');

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c6 SET NOT NULL;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c7 DROP NOT NULL;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c8 TYPE char(10);

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c8 SET DATA TYPE text;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c7 OPTIONS (ADD p1 'v1',
    ADD p2 'v2'),
    ALTER COLUMN c8 OPTIONS (ADD p1 'v1',
    ADD p2 'v2');

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    ALTER COLUMN c8 OPTIONS ( SET p2 'V2',
    DROP p1);

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    DROP CONSTRAINT IF EXISTS no_const;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    DROP CONSTRAINT ft1_c1_check;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1 OWNER TO regress_test_role;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1 OPTIONS (DROP DELIMITER, SET quote '~',
ADD escape '@');

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    DROP COLUMN IF EXISTS no_column;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1
    DROP COLUMN c9;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1 SET SCHEMA foreign_schema;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1 RENAME c1 TO foreign_column_1;

ALTER FOREIGN TABLE IF EXISTS doesnt_exist_ft1 RENAME TO foreign_table_1;

-- Information schema
SELECT
    *
FROM
    information_schema.foreign_data_wrappers
ORDER BY
    1,
    2;

SELECT
    *
FROM
    information_schema.foreign_data_wrapper_options
ORDER BY
    1,
    2,
    3;

SELECT
    *
FROM
    information_schema.foreign_servers
ORDER BY
    1,
    2;

SELECT
    *
FROM
    information_schema.foreign_server_options
ORDER BY
    1,
    2,
    3;

SELECT
    *
FROM
    information_schema.user_mappings
ORDER BY
    lower(authorization_identifier),
    2,
    3;

SELECT
    *
FROM
    information_schema.user_mapping_options
ORDER BY
    lower(authorization_identifier),
    2,
    3,
    4;

SELECT
    *
FROM
    information_schema.usage_privileges
WHERE
    object_type LIKE 'FOREIGN%'
    AND object_name IN ('s6', 'foo')
ORDER BY
    1,
    2,
    3,
    4,
    5;

SELECT
    *
FROM
    information_schema.role_usage_grants
WHERE
    object_type LIKE 'FOREIGN%'
    AND object_name IN ('s6', 'foo')
ORDER BY
    1,
    2,
    3,
    4,
    5;

SELECT
    *
FROM
    information_schema.foreign_tables
ORDER BY
    1,
    2,
    3;

SELECT
    *
FROM
    information_schema.foreign_table_options
ORDER BY
    1,
    2,
    3,
    4;

SET ROLE regress_test_role;

SELECT
    *
FROM
    information_schema.user_mapping_options
ORDER BY
    1,
    2,
    3,
    4;

SELECT
    *
FROM
    information_schema.usage_privileges
WHERE
    object_type LIKE 'FOREIGN%'
    AND object_name IN ('s6', 'foo')
ORDER BY
    1,
    2,
    3,
    4,
    5;

SELECT
    *
FROM
    information_schema.role_usage_grants
WHERE
    object_type LIKE 'FOREIGN%'
    AND object_name IN ('s6', 'foo')
ORDER BY
    1,
    2,
    3,
    4,
    5;

DROP USER MAPPING FOR CURRENT_USER SERVER t1;

SET ROLE regress_test_role2;

SELECT
    *
FROM
    information_schema.user_mapping_options
ORDER BY
    1,
    2,
    3,
    4;

RESET ROLE;

-- has_foreign_data_wrapper_privilege
SELECT
    has_foreign_data_wrapper_privilege('regress_test_role', (
            SELECT
                oid
            FROM pg_foreign_data_wrapper
            WHERE
                fdwname = 'foo'), 'USAGE');

SELECT
    has_foreign_data_wrapper_privilege('regress_test_role', 'foo', 'USAGE');

SELECT
    has_foreign_data_wrapper_privilege((
        SELECT
            oid
        FROM pg_roles
        WHERE
            rolname = 'regress_test_role'), (
        SELECT
            oid
        FROM pg_foreign_data_wrapper
        WHERE
            fdwname = 'foo'), 'USAGE');

SELECT
    has_foreign_data_wrapper_privilege((
        SELECT
            oid
        FROM pg_foreign_data_wrapper
        WHERE
            fdwname = 'foo'), 'USAGE');

SELECT
    has_foreign_data_wrapper_privilege((
        SELECT
            oid
        FROM pg_roles
        WHERE
            rolname = 'regress_test_role'), 'foo', 'USAGE');

SELECT
    has_foreign_data_wrapper_privilege('foo', 'USAGE');

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_role;

SELECT
    has_foreign_data_wrapper_privilege('regress_test_role', 'foo', 'USAGE');

-- has_server_privilege
SELECT
    has_server_privilege('regress_test_role', (
            SELECT
                oid
            FROM pg_foreign_server
            WHERE
                srvname = 's8'), 'USAGE');

SELECT
    has_server_privilege('regress_test_role', 's8', 'USAGE');

SELECT
    has_server_privilege((
        SELECT
            oid
        FROM pg_roles
        WHERE
            rolname = 'regress_test_role'), (
        SELECT
            oid
        FROM pg_foreign_server
        WHERE
            srvname = 's8'), 'USAGE');

SELECT
    has_server_privilege((
        SELECT
            oid
        FROM pg_foreign_server
        WHERE
            srvname = 's8'), 'USAGE');

SELECT
    has_server_privilege((
        SELECT
            oid
        FROM pg_roles
        WHERE
            rolname = 'regress_test_role'), 's8', 'USAGE');

SELECT
    has_server_privilege('s8', 'USAGE');

GRANT USAGE ON FOREIGN SERVER s8 TO regress_test_role;

SELECT
    has_server_privilege('regress_test_role', 's8', 'USAGE');

REVOKE USAGE ON FOREIGN SERVER s8 FROM regress_test_role;

GRANT USAGE ON FOREIGN SERVER s4 TO regress_test_role;

DROP USER MAPPING FOR public SERVER s4;

ALTER SERVER s6 OPTIONS (DROP host,
DROP dbname);

ALTER USER MAPPING FOR regress_test_role SERVER s6 OPTIONS (DROP username);

ALTER FOREIGN DATA WRAPPER foo VALIDATOR postgresql_fdw_validator;

-- Privileges
SET ROLE regress_unprivileged_role;

CREATE FOREIGN DATA WRAPPER foobar;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OPTIONS (gotcha 'true');

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OWNER TO regress_unprivileged_role;

-- ERROR
DROP FOREIGN DATA WRAPPER foo;

-- ERROR
GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_role;

-- ERROR
CREATE SERVER s9 FOREIGN DATA WRAPPER foo;

-- ERROR
ALTER SERVER s4 VERSION '0.5';

-- ERROR
ALTER SERVER s4 OWNER TO regress_unprivileged_role;

-- ERROR
DROP SERVER s4;

-- ERROR
GRANT USAGE ON FOREIGN SERVER s4 TO regress_test_role;

-- ERROR
CREATE USER MAPPING FOR public SERVER s4;

-- ERROR
ALTER USER MAPPING FOR regress_test_role SERVER s6 OPTIONS (gotcha 'true');

-- ERROR
DROP USER MAPPING FOR regress_test_role SERVER s6;

-- ERROR
RESET ROLE;

GRANT USAGE ON FOREIGN DATA WRAPPER postgresql TO regress_unprivileged_role;

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_unprivileged_role WITH GRANT OPTION;

SET ROLE regress_unprivileged_role;

CREATE FOREIGN DATA WRAPPER foobar;

-- ERROR
ALTER FOREIGN DATA WRAPPER foo OPTIONS (gotcha 'true');

-- ERROR
DROP FOREIGN DATA WRAPPER foo;

-- ERROR
GRANT USAGE ON FOREIGN DATA WRAPPER postgresql TO regress_test_role;

-- WARNING
GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_role;

CREATE SERVER s9 FOREIGN DATA WRAPPER postgresql;

ALTER SERVER s6 VERSION '0.5';

-- ERROR
DROP SERVER s6;

-- ERROR
GRANT USAGE ON FOREIGN SERVER s6 TO regress_test_role;

-- ERROR
GRANT USAGE ON FOREIGN SERVER s9 TO regress_test_role;

CREATE USER MAPPING FOR public SERVER s6;

-- ERROR
CREATE USER MAPPING FOR public SERVER s9;

ALTER USER MAPPING FOR regress_test_role SERVER s6 OPTIONS (gotcha 'true');

-- ERROR
DROP USER MAPPING FOR regress_test_role SERVER s6;

-- ERROR
RESET ROLE;

REVOKE USAGE ON FOREIGN DATA WRAPPER foo FROM regress_unprivileged_role;

-- ERROR
REVOKE USAGE ON FOREIGN DATA WRAPPER foo FROM regress_unprivileged_role CASCADE;

SET ROLE regress_unprivileged_role;

GRANT USAGE ON FOREIGN DATA WRAPPER foo TO regress_test_role;

-- ERROR
CREATE SERVER s10 FOREIGN DATA WRAPPER foo;

-- ERROR
ALTER SERVER s9 VERSION '1.1';

GRANT USAGE ON FOREIGN SERVER s9 TO regress_test_role;

CREATE USER MAPPING FOR CURRENT_USER SERVER s9;

DROP SERVER s9 CASCADE;

RESET ROLE;

CREATE SERVER s9 FOREIGN DATA WRAPPER foo;

GRANT USAGE ON FOREIGN SERVER s9 TO regress_unprivileged_role;

SET ROLE regress_unprivileged_role;

ALTER SERVER s9 VERSION '1.2';

-- ERROR
GRANT USAGE ON FOREIGN SERVER s9 TO regress_test_role;

-- WARNING
CREATE USER MAPPING FOR CURRENT_USER SERVER s9;

DROP SERVER s9 CASCADE;

-- ERROR
-- Check visibility of user mapping data
SET ROLE regress_test_role;

CREATE SERVER s10 FOREIGN DATA WRAPPER foo;

CREATE USER MAPPING FOR public SERVER s10 OPTIONS (
    USER 'secret'
);

CREATE USER MAPPING FOR regress_unprivileged_role SERVER s10 OPTIONS (
    USER 'secret'
);

-- owner of server can see some option fields
\deu+
RESET ROLE;

-- superuser can see all option fields
\deu+
-- unprivileged user cannot see any option field
SET ROLE regress_unprivileged_role;

\deu+
RESET ROLE;

DROP SERVER s10 CASCADE;

-- Triggers
CREATE FUNCTION dummy_trigger ()
    RETURNS TRIGGER
    AS $$
BEGIN
    RETURN NULL;
END
$$
LANGUAGE plpgsql;

CREATE TRIGGER trigtest_before_stmt
    BEFORE INSERT OR UPDATE OR DELETE ON foreign_schema.foreign_table_1
    FOR EACH STATEMENT
    EXECUTE PROCEDURE dummy_trigger ();

CREATE TRIGGER trigtest_after_stmt
    AFTER INSERT OR UPDATE OR DELETE ON foreign_schema.foreign_table_1
    FOR EACH STATEMENT
    EXECUTE PROCEDURE dummy_trigger ();

CREATE TRIGGER trigtest_after_stmt_tt
    AFTER INSERT OR UPDATE OR DELETE -- ERROR
    ON foreign_schema.foreign_table_1 REFERENCING NEW TABLE AS new_table
    FOR EACH STATEMENT
    EXECUTE PROCEDURE dummy_trigger ();

CREATE TRIGGER trigtest_before_row
    BEFORE INSERT OR UPDATE OR DELETE ON foreign_schema.foreign_table_1
    FOR EACH ROW
    EXECUTE PROCEDURE dummy_trigger ();

CREATE TRIGGER trigtest_after_row
    AFTER INSERT OR UPDATE OR DELETE ON foreign_schema.foreign_table_1
    FOR EACH ROW
    EXECUTE PROCEDURE dummy_trigger ();

CREATE CONSTRAINT TRIGGER trigtest_constraint
    AFTER INSERT OR UPDATE OR DELETE ON foreign_schema.foreign_table_1
    FOR EACH ROW
    EXECUTE PROCEDURE dummy_trigger ();

ALTER FOREIGN TABLE foreign_schema.foreign_table_1 DISABLE TRIGGER trigtest_before_stmt;

ALTER FOREIGN TABLE foreign_schema.foreign_table_1 ENABLE TRIGGER trigtest_before_stmt;

DROP TRIGGER trigtest_before_stmt ON foreign_schema.foreign_table_1;

DROP TRIGGER trigtest_before_row ON foreign_schema.foreign_table_1;

DROP TRIGGER trigtest_after_stmt ON foreign_schema.foreign_table_1;

DROP TRIGGER trigtest_after_row ON foreign_schema.foreign_table_1;

DROP FUNCTION dummy_trigger ();

-- Table inheritance
CREATE TABLE fd_pt1 (
    c1 integer NOT NULL,
    c2 text,
    c3 date
);

CREATE FOREIGN TABLE ft2 ()
INHERITS (
    fd_pt1)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

\d+ fd_pt1
\d+ ft2
DROP FOREIGN TABLE ft2;

\d+ fd_pt1
CREATE FOREIGN TABLE ft2 (
    c1 integer NOT NULL,
    c2 text,
    c3 date)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

\d+ ft2
ALTER FOREIGN TABLE ft2 INHERIT fd_pt1;

\d+ fd_pt1
\d+ ft2
CREATE TABLE ct3 ()
INHERITS (
    ft2
);

CREATE FOREIGN TABLE ft3 (
    c1 integer NOT NULL,
    c2 text,
    c3 date
)
INHERITS (
    ft2)
SERVER s0;

\d+ ft2
\d+ ct3
\d+ ft3
-- add attributes recursively
ALTER TABLE fd_pt1
    ADD COLUMN c4 integer;

ALTER TABLE fd_pt1
    ADD COLUMN c5 integer DEFAULT 0;

ALTER TABLE fd_pt1
    ADD COLUMN c6 integer;

ALTER TABLE fd_pt1
    ADD COLUMN c7 integer NOT NULL;

ALTER TABLE fd_pt1
    ADD COLUMN c8 integer;

\d+ fd_pt1
\d+ ft2
\d+ ct3
\d+ ft3
-- alter attributes recursively
ALTER TABLE fd_pt1
    ALTER COLUMN c4 SET DEFAULT 0;

ALTER TABLE fd_pt1
    ALTER COLUMN c5 DROP DEFAULT;

ALTER TABLE fd_pt1
    ALTER COLUMN c6 SET NOT NULL;

ALTER TABLE fd_pt1
    ALTER COLUMN c7 DROP NOT NULL;

ALTER TABLE fd_pt1
    ALTER COLUMN c8 TYPE char(10)
    USING '0';

-- ERROR
ALTER TABLE fd_pt1
    ALTER COLUMN c8 TYPE char(10);

ALTER TABLE fd_pt1
    ALTER COLUMN c8 SET DATA TYPE text;

ALTER TABLE fd_pt1
    ALTER COLUMN c1 SET STATISTICS 10000;

ALTER TABLE fd_pt1
    ALTER COLUMN c1 SET (n_distinct = 100);

ALTER TABLE fd_pt1
    ALTER COLUMN c8 SET STATISTICS - 1;

ALTER TABLE fd_pt1
    ALTER COLUMN c8 SET STORAGE EXTERNAL;

\d+ fd_pt1
\d+ ft2
-- drop attributes recursively
ALTER TABLE fd_pt1
    DROP COLUMN c4;

ALTER TABLE fd_pt1
    DROP COLUMN c5;

ALTER TABLE fd_pt1
    DROP COLUMN c6;

ALTER TABLE fd_pt1
    DROP COLUMN c7;

ALTER TABLE fd_pt1
    DROP COLUMN c8;

\d+ fd_pt1
\d+ ft2
-- add constraints recursively
ALTER TABLE fd_pt1
    ADD CONSTRAINT fd_pt1chk1 CHECK (c1 > 0) NO INHERIT;

ALTER TABLE fd_pt1
    ADD CONSTRAINT fd_pt1chk2 CHECK (c2 <> '');

-- connoinherit should be true for NO INHERIT constraint
SELECT
    relname,
    conname,
    contype,
    conislocal,
    coninhcount,
    connoinherit
FROM
    pg_class AS pc
    JOIN pg_constraint AS pgc ON (conrelid = pc.oid)
WHERE
    pc.relname = 'fd_pt1'
ORDER BY
    1,
    2;

-- child does not inherit NO INHERIT constraints
\d+ fd_pt1
\d+ ft2
DROP FOREIGN TABLE ft2;

-- ERROR
DROP FOREIGN TABLE ft2 CASCADE;

CREATE FOREIGN TABLE ft2 (
    c1 integer NOT NULL,
    c2 text,
    c3 date)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

-- child must have parent's INHERIT constraints
ALTER FOREIGN TABLE ft2 INHERIT fd_pt1;

-- ERROR
ALTER FOREIGN TABLE ft2
    ADD CONSTRAINT fd_pt1chk2 CHECK (c2 <> '');

ALTER FOREIGN TABLE ft2 INHERIT fd_pt1;

-- child does not inherit NO INHERIT constraints
\d+ fd_pt1
\d+ ft2
-- drop constraints recursively
ALTER TABLE fd_pt1
    DROP CONSTRAINT fd_pt1chk1 CASCADE;

ALTER TABLE fd_pt1
    DROP CONSTRAINT fd_pt1chk2 CASCADE;

-- NOT VALID case
INSERT INTO fd_pt1
    VALUES (1, 'fd_pt1'::text, '1994-01-01'::date);

ALTER TABLE fd_pt1
    ADD CONSTRAINT fd_pt1chk3 CHECK (c2 <> '') NOT VALID;

\d+ fd_pt1
\d+ ft2
-- VALIDATE CONSTRAINT need do nothing on foreign tables
ALTER TABLE fd_pt1 VALIDATE CONSTRAINT fd_pt1chk3;

\d+ fd_pt1
\d+ ft2
-- changes name of an attribute recursively
ALTER TABLE fd_pt1 RENAME COLUMN c1 TO f1;

ALTER TABLE fd_pt1 RENAME COLUMN c2 TO f2;

ALTER TABLE fd_pt1 RENAME COLUMN c3 TO f3;

-- changes name of a constraint recursively
ALTER TABLE fd_pt1 RENAME CONSTRAINT fd_pt1chk3 TO f2_check;

\d+ fd_pt1
\d+ ft2
-- TRUNCATE doesn't work on foreign tables, either directly or recursively
TRUNCATE ft2;

-- ERROR
TRUNCATE fd_pt1;

-- ERROR
DROP TABLE fd_pt1 CASCADE;

-- IMPORT FOREIGN SCHEMA
IMPORT FOREIGN SCHEMA s1
FROM
    SERVER s9 INTO public;

-- ERROR
IMPORT FOREIGN SCHEMA s1
LIMIT TO (t1)
FROM
    SERVER s9 INTO public;

--ERROR
IMPORT FOREIGN SCHEMA s1
EXCEPT (t1)
FROM
    SERVER s9 INTO public;

-- ERROR
IMPORT FOREIGN SCHEMA s1
EXCEPT (t1,
    t2)
FROM
    SERVER s9 INTO public OPTIONS (option1 'value1', option2 'value2');

-- ERROR
-- DROP FOREIGN TABLE
DROP FOREIGN TABLE no_table;

-- ERROR
DROP FOREIGN TABLE IF EXISTS no_table;

DROP FOREIGN TABLE foreign_schema.foreign_table_1;

-- REASSIGN OWNED/DROP OWNED of foreign objects
REASSIGN OWNED BY regress_test_role TO regress_test_role2;

DROP OWNED BY regress_test_role2;

DROP OWNED BY regress_test_role2 CASCADE;

-- Foreign partition DDL stuff
CREATE TABLE fd_pt2 (
    c1 integer NOT NULL,
    c2 text,
    c3 date
)
PARTITION BY LIST (c1);

CREATE FOREIGN TABLE fd_pt2_1 PARTITION OF fd_pt2
FOR VALUES IN (1) SERVER s0 OPTIONS (DELIMITER ',', quote '"', "be quoted" 'value');

\d+ fd_pt2
\d+ fd_pt2_1
-- partition cannot have additional columns
DROP FOREIGN TABLE fd_pt2_1;

CREATE FOREIGN TABLE fd_pt2_1 (
    c1 integer NOT NULL,
    c2 text,
    c3 date,
    c4 char)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

\d+ fd_pt2_1
ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

-- ERROR
DROP FOREIGN TABLE fd_pt2_1;

\d+ fd_pt2
CREATE FOREIGN TABLE fd_pt2_1 (
    c1 integer NOT NULL,
    c2 text,
    c3 date)
SERVER s0 OPTIONS (
    DELIMITER ',',
    quote '"',
    "be quoted" 'value'
);

\d+ fd_pt2_1
-- no attach partition validation occurs for foreign tables
ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

\d+ fd_pt2
\d+ fd_pt2_1
-- cannot add column to a partition
ALTER TABLE fd_pt2_1
    ADD c4 char;

-- ok to have a partition's own constraints though
ALTER TABLE fd_pt2_1
    ALTER c3 SET NOT NULL;

ALTER TABLE fd_pt2_1
    ADD CONSTRAINT p21chk CHECK (c2 <> '');

\d+ fd_pt2
\d+ fd_pt2_1
-- cannot drop inherited NOT NULL constraint from a partition
ALTER TABLE fd_pt2_1
    ALTER c1 DROP NOT NULL;

-- partition must have parent's constraints
ALTER TABLE fd_pt2 DETACH PARTITION fd_pt2_1;

ALTER TABLE fd_pt2
    ALTER c2 SET NOT NULL;

\d+ fd_pt2
\d+ fd_pt2_1
ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

-- ERROR
ALTER FOREIGN TABLE fd_pt2_1
    ALTER c2 SET NOT NULL;

ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

ALTER TABLE fd_pt2 DETACH PARTITION fd_pt2_1;

ALTER TABLE fd_pt2
    ADD CONSTRAINT fd_pt2chk1 CHECK (c1 > 0);

\d+ fd_pt2
\d+ fd_pt2_1
ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

-- ERROR
ALTER FOREIGN TABLE fd_pt2_1
    ADD CONSTRAINT fd_pt2chk1 CHECK (c1 > 0);

ALTER TABLE fd_pt2 ATTACH PARTITION fd_pt2_1
FOR VALUES IN (1);

-- TRUNCATE doesn't work on foreign tables, either directly or recursively
TRUNCATE fd_pt2_1;

-- ERROR
TRUNCATE fd_pt2;

-- ERROR
DROP FOREIGN TABLE fd_pt2_1;

DROP TABLE fd_pt2;

-- foreign table cannot be part of partition tree made of temporary
-- relations.
CREATE TEMP TABLE temp_parted (
    a int
)
PARTITION BY LIST (a);

CREATE FOREIGN TABLE foreign_part PARTITION OF temp_parted DEFAULT SERVER s0;

-- ERROR
CREATE FOREIGN TABLE foreign_part (
    a int)
SERVER s0;

ALTER TABLE temp_parted ATTACH PARTITION foreign_part DEFAULT;

-- ERROR
DROP FOREIGN TABLE foreign_part;

DROP TABLE temp_parted;

-- Cleanup
DROP SCHEMA foreign_schema CASCADE;

DROP ROLE regress_test_role;

-- ERROR
DROP SERVER t1 CASCADE;

DROP USER MAPPING FOR regress_test_role SERVER s6;

DROP FOREIGN DATA WRAPPER foo CASCADE;

DROP SERVER s8 CASCADE;

DROP ROLE regress_test_indirect;

DROP ROLE regress_test_role;

DROP ROLE regress_unprivileged_role;

-- ERROR
REVOKE ALL ON FOREIGN DATA WRAPPER postgresql FROM regress_unprivileged_role;

DROP ROLE regress_unprivileged_role;

DROP ROLE regress_test_role2;

DROP FOREIGN DATA WRAPPER postgresql CASCADE;

DROP FOREIGN DATA WRAPPER dummy CASCADE;

\c
DROP ROLE regress_foreign_data_user;

-- At this point we should have no wrappers, no servers, and no mappings.
SELECT
    fdwname,
    fdwhandler,
    fdwvalidator,
    fdwoptions
FROM
    pg_foreign_data_wrapper;

SELECT
    srvname,
    srvoptions
FROM
    pg_foreign_server;

SELECT
    *
FROM
    pg_user_mapping;

